See also:

Functional readiness of the airbag system
When the ignition is switch on, the warning lamp in the instrument cluster lights up briefly and thereby indicates the operational readiness of the entire airbag system and the belt tensione ...

Buttons at a glance
1 System on/off, interrupt 2 Resume speed 3 Store speed* 4 Reduce distance 5 Store, maintain/change speed 6 Increase distance ...

Malfunction
A message is displayed in the instrument cluster. HDC is not available, e.g., due to elevated brake temperatures. ...